Cannot Fully Disable HDMI device tree overlay, HDMI Okay/HDMIN to be specific.

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1

I have had some trouble disabling the HDMI dtc on my Rev A6A beaglebone black.

Thus far I have tried the following ( making small variations, such as order etc.)

#This was my first attempt

#optargs=capemgr.enable_partno=BB-SPIDEV1,capemgr.disable_partno=BB-BONELT-HDMI,capemgr.disable_partno=BB-BONELT-HDMIN

##This was nth,
optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPIDEV1,capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

Here are my results***

root@arm:~# cat $SLOTS
0: 54:PF—
1: 55:PF—
2: 56:PF—
3: 57:PF—
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPIDEV1
9: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-BONELT-HDMIN

This issue that I believe I am having is that once I disable BB-BONELT-HDMI, BB-BONELT-HDMIN is enabled by a background task.

Any suggestions? I will be happy to provide more info.

Thanks in advance to those who can help.

2

I have had some trouble disabling the HDMI dtc on my Rev A6A beaglebone black.

Thus far I have tried the following ( making small variations, such as order etc.)

#This was my first attempt

#optargs=capemgr.enable_partno=BB-SPIDEV1,capemgr.disable_partno=BB-BONELT-HDMI,capemgr.disable_partno=BB-BONELT-HDMIN

##This was nth,
optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPIDEV1,capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

Remove the “,” between BB-SPIDEV1 and capemgr.disable_partno

I’m not sure if this make a difference, but I would place the disable before the enable.

Regards,
John

3

I am using Ubuntu 15.04 and the BB Debian image on my BBB is 2014-04-23. I have been trying for some days now to disable my HDMI and HDMIN overlays so that I can access my BB-SPIDEV1 with limited success. One command in particular (i.e. optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN) does indeed disable HDMI yet with that said it will not allow me to enable SPIDEV1. I have boldface highlighted the commands that were used as well as the o/p for presentation purposes. Any insight into resolving this problem would be helpful and much appreciated. Further note: I also tried optargs=capemgr.disable_partno=BB-BONELT-HDMI and all to no avail.

uEnv.txt

##Disable HDMI

#optargs=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

#cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

#optargs=capemgr.disable_partno=BB-BONELT-HDMI

optargs=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

optargs=capemgr.enable_partno=BB-SPIDEV1

#optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

dean@beaglebone:~$ cat $SLOTS

0: 54:PF—

1: 55:PF—

2: 56:PF—

3: 57:PF—

4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G

6: ff:P-O-L Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN

7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPIDEV1

4

I am using Ubuntu 15.04 and the BB Debian image on my BBB is 2014-04-23. I
have been trying for some days now to disable my HDMI and HDMIN overlays so

It would have been faster to first upgrade to "2015-11-03

http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#2015-11-03

that I can access my BB-SPIDEV1 with limited success. One command in
particular (i.e. optargs=quiet
capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN) does indeed disable
HDMI yet with that said it will not allow me to enable SPIDEV1. I have
boldface highlighted the commands that were used as well as the o/p for
presentation purposes. Any insight into resolving this problem would be
helpful and much appreciated. Further note: I also tried
optargs=capemgr.disable_partno=BB-BONELT-HDMI and all to no avail.

optargs=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
optargs=capemgr.enable_partno=BB-SPIDEV1

Then that would have worked out of the box..

Regards,

5

Thanks for the reply. In the link that you sent me http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#2015-11-03 Is the procedure as listed in section 3.2 (i.e.flash the eMMC) all that is required to update my BB image or is there more to it ? I am very new at this and I am trying to decipher all that is relevant in getting the following command to work …

$ sudo sh -c "echo BB-SPIDEV1 > $SLOTS

Regards,

Dean

6

For those that might benefit from my findings. Initially I could not flash the BBB. Why ? The driver for my card reader is not supported under Linux. I have yet to determine if I will now be able to disable the HDMI with this latest image

7

Managed to disable the HDMI with the latest image. Thanks Robert.